Denny's has been around for a long time. I remember that the Denny's in San Bernardino, California was a favorite high schooler after-the-movie stop-off back in the late 1950's.
I have fond memories of Denny's in Texas - particularly when I was still a smoker - one of the few dinners that allowed smoking- then they gradually starting closing up.
The Denny's at Academy, and Flintridge in Colorado Springs. I think it is now closed.
Denny's is trying to make a come-back. In Arlington, Texas a new "modified" Denny's opened a couple of years ago adjacent to a Shell convenience store. That one is doing well. Denny's deserves our business- along with any businesses that respects our right to bear arms.